Tru-Zero magnetic hook measures accurately every time. Strong rare earth magnet holds securely onto metal surfaces. 11'blade standout for reach and ease of use. 1-1/4" wide blade for large, easy-to-read measurements. BladeArmor coating protects the blade and reduces breakage. Mylar blade coating extends blade life and helps to prevent rust. SlideLock holdsblade securely in position. High-impact ABS (Acrylonitrile Butadiene Styrene) case with durable rubber holds up to heavy use. 16" and 19.2" stud center markings simplify framing jobs. Three-rivet, corrosion-resistant end hook for accurate measurements.